This paper describes how an educational digital material supports the improvement of skills in the development of algorithms within math problems, which belong to a part of an operative computational thinking, in students of the subject logic programming. This paper reflects how students lack the fundamentals of math and the algorithmic thinking which is required to solve the problems established in the educational digital material. The results show that doing a reiterative challenge helps student not only to get the fundamentals of math, but also to solve the algorithms used in the educational digital material, learning from the mistakes made.